Compact dual-band bandpass filter using meander short-circuit quarter-wavelength resonators

2011 ◽  
Vol 54 (2) ◽  
pp. 344-346 ◽  
Author(s):  
H. W. Liu ◽  
Z. C. Zhang ◽  
G. W. Wei ◽  
L. Shen ◽  
X. H. Guan
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Dual Band ◽  
Quarter Wavelength

scholarly journals Dual-band bandpass filter based on two U-shaped defected microstrip structure

2021 ◽  
Vol 22 (2) ◽  
pp. 909
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Yully Masrukin ◽  
Tole Sutikno
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Notch Filter ◽  
Dual Band ◽  
Design System ◽  
High Attenuation ◽  
Quarter Wavelength ◽  
Insertion Losses ◽  
Microstrip Structure ◽  
Better Than

This paper presents design of dual-band bandpass filter by integrating conventional quarter-wavelength short circuit stubs bandpass filter with U-shaped defected microstrip structure notch filter. Based on the parametric analysis, it is found that high attenuation level can be achieved by using two U-shaped defected microstrip structure separated by specific distance. The designed circuit simulated using advanced design system and fabricated based on Roger 4350B. The simulation results are in good agreement with measured results. The designed filter covered two pass bands centered at 2.51 GHz and 3.59 GHz with 3-dB fractional bandwidth of 15.94% and 15.86%, respectively, return losses better than 15 dB, and insertion losses better than 1 dB. The designed device can be used for wireless communication applications such as WLAN and WiMAX.

scholarly journals Effect of the defected microstrip structure shapes on the performance of dual-band bandpass filter for wireless communications

2021 ◽  
Vol 10 (1) ◽  
pp. 232-240
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Yully Erwanti Masrukin ◽  
Tole Sutikno ◽  
Hussein Alsariera
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Bandpass Filter ◽  
Dual Band ◽  
Center Frequency ◽  
Wireless Communication Systems ◽  
Notch Band ◽  
Quarter Wavelength ◽  
Crucial Component ◽  
Microstrip Structure

Due to the progression growth of multiservice wireless communication systems in a single device, multiband bandpass filter has attract a great attention to the end user. Therefore, multiband bandpass filter is a crucial component in the multiband transceivers systems which can support multiple services in one device. This paper presents a design of dual-band bandpass filter at 2.4 GHz and 3.5 GHz for WLAN and WiMAX applications. Firstly, the wideband bandpass filter is designed at a center frequency of 3 GHz based on quarter-wavelength short circuited stub. Three types of defected microstrip structure (DMS) are implemented to produce a wide notch band, which are T-inversed shape, C-shape, and U- Shape. Based on the performance comparisons, U-shaped DMS is selected to be integrated with the bandpass filter. The designed filter achieved two passbands centered at 2.51 GHz and 3.59 GHz with 3 dB bandwidth of 15.94 % and 15.86 %. The proposed design is very useful for wireless communication systems and its applications such as WLAN and WiMAX 

Miniaturized Bandpass Filter with Wide Stopband using Spiral Configuration of Stepped Impedance Resonator

Frequenz ◽  
2018 ◽  
Vol 72 (9-10) ◽  
pp. 455-458 ◽  
Author(s):  
Vivek Singh ◽  
Vinay Kumar Killamsetty ◽  
Biswajeet Mukherjee
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Rejection Level ◽  
Compact Size ◽  
Band Pass ◽  
Stepped Impedance Resonator

Abstract In this letter, a miniaturized Band Pass Filter (BPF) with wide stopband centered at 0.350 GHz for TETRA band applications is proposed using a Spiral Short Circuit quarter wavelength Stepped Impedance Resonator (SSC-SIR) and a stub loaded on feed line for enhancement of rejection level in the stopband. Spiral configuration of the resonator is used for the miniaturization of BPF. The proposed BPF provides a 3dB fractional bandwidth of 13.7 % with two transmission zeros in the lower and upper stopband to provide good selectivity and four transmission zeros which provide wide stopband upto 6.86f0. Proposed BPF has a very compact size of 0.064λg×0.062λg.

Finite Ground CB-CPW Bandpass Filter using Vertically Installed Coupled Open-ended Stubs

2020 ◽  
Vol 35 (9) ◽  
pp. 1053-1058
Author(s):  
Pratik Mondal ◽  
Susanta Parui ◽  
Rajesh Bera
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Coplanar Waveguide ◽  
Minimum Size ◽  
Center Frequency ◽  
Design Technique ◽  
Signal Line ◽  
Input Terminal ◽  
Quarter Wavelength ◽  
In Series

In this paper, a conductor backed coplanar waveguide (CB-CPW) 3rd order bandpass filter is designed using coupled open-ended stub resonator placed vertically to the signal line. Vertically loaded open ended stubs are designed at quarter wavelength so as to behave like a short circuit at the input terminal thus giving a band-accepted response with lesser metallic area or minimum size. Four such coupled open ended resonators are placed in series and also in closely manner to provide greater field confinement of the proposed bandpass filter. The bandpass filter is designed for a center frequency of 2.5 GHz with FBW of 97.89%, insertion loss of <0.5dB, rising and falling edge selectivity of 30.75 dB/GHz and 27.01dB/GHz respectively with a wide stopband of around 4GHz after the desired passband. Further to validate the design technique six such resonators are placed to obtain 5th order bandpass filter.

A compact dual-band bandpass filter using folded quarter-wavelength resonators

2012 ◽  
Author(s):  
Nikolina Jankovic ◽  
Vasa Radonic ◽  
Vesna Crnojevic-Bengin ◽  
Riana Geschke
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Quarter Wavelength
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